<?php
// +----------------------------------------------------------------------
// | ThinkPHP
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

/**
 +------------------------------------------------------------------------------
 * Http 工具类
 * 提供一系列的Http方法
 +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Net
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id$
 +------------------------------------------------------------------------------
 */
class Http extends Think
{
    //类定义开始

    /**
     +----------------------------------------------------------
     * 采集远程文件
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $remote 远程文件名
     * @param string $local 本地保存文件名
     +----------------------------------------------------------
     * @return mixed
     +----------------------------------------------------------
     */
    public static function curl_download($remote, $local)
    {
        $cp = curl_init($remote);
        $fp = fopen($local, "w");
        curl_setopt($cp, CURLOPT_FILE, $fp);
        curl_setopt($cp, CURLOPT_HEADER, 0);
        curl_exec($cp);
        curl_close($cp);
        fclose($fp);
    }

    /**
     +----------------------------------------------------------
     * 下载文件
     * 可以指定下载显示的文件名，并自动发送相应的Header信息
     * 如果指定了content参数，则下载该参数的内容
     +----------------------------------------------------------
     * @static
     * @access public
     +----------------------------------------------------------
     * @param string $filename 下载文件名
     * @param string $showname 下载显示的文件名
     * @param string $content  下载的内容
     * @param integer $expire  下载内容浏览器缓存时间
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     * @throws ThinkExecption
     +----------------------------------------------------------
     */
    public static function download($filename, $showname='', $content='', $expire=180)
    {
        if (is_file($filename)) {
            $length = filesize($filename);
        } elseif (is_file(UPLOAD_PATH.$filename)) {
            $filename = UPLOAD_PATH.$filename;
            $length = filesize($filename);
        } elseif ($content != '') {
            $length = strlen($content);
        } else {
            throw_exception(L('PUBLIC_ATTACH_ISNULL'));
            //throw_exception($filename.L('PUBLIC_ATTACH_ISNULL'));
        }
        if (empty($showname)) {
            $showname = $filename;
        }
        //造成部分中文文件的乱码问题
        //$showname = basename($showname);
        if (!empty($filename)) {
            $type = mime_content_type($filename);
        } else {
            $type     =     "application/octet-stream";
        }
        //发送Http Header信息 开始下载
        header("Pragma: public");
        header("Cache-control: max-age=".$expire);
        //header('Cache-Control: no-store, no-cache, must-revalidate');
        header("Expires: " . gmdate("D, d M Y H:i:s", time()+$expire) . "GMT");
        header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . "GMT");
        header("Content-Length: ".$length);
        header("Content-type: ".$type);
        header("Content-Disposition: attachment; filename= ".$showname." ");
        header('Content-Encoding: none');
        header("Content-Transfer-Encoding: binary");
        if ($content == '') {
            readfile($filename);
        } else {
            echo($content);
        }
        exit();
    }

    /**
     +----------------------------------------------------------
     * 显示HTTP Header 信息
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public static function get_header_info($header='', $echo=true)
    {
        ob_start();
        $headers   = getallheaders();
        if (!empty($header)) {
            $info = $headers[$header];
            echo($header.':'.$info."\n");
            ;
        } else {
            foreach ($headers as $key=>$val) {
                echo("$key:$val\n");
            }
        }
        $output = ob_get_clean();
        if ($echo) {
            echo(nl2br($output));
        } else {
            return $output;
        }
    }

    /**
     * HTTP Protocol defined status codes
     * @param int $num
     */
    public static function send_http_status($code)
    {
        static $_status = array(
            // Informational 1xx
            100 => 'Continue',
            101 => 'Switching Protocols',

            // Success 2xx
            200 => 'OK',
            201 => 'Created',
            202 => 'Accepted',
            203 => 'Non-Authoritative Information',
            204 => 'No Content',
            205 => 'Reset Content',
            206 => 'Partial Content',

            // Redirection 3xx
            300 => 'Multiple Choices',
            301 => 'Moved Permanently',
            302 => 'Found',  // 1.1
            303 => 'See Other',
            304 => 'Not Modified',
            305 => 'Use Proxy',
            // 306 is deprecated but reserved
            307 => 'Temporary Redirect',

            // Client Error 4xx
            400 => 'Bad Request',
            401 => 'Unauthorized',
            402 => 'Payment Required',
            403 => 'Forbidden',
            404 => 'Not Found',
            405 => 'Method Not Allowed',
            406 => 'Not Acceptable',
            407 => 'Proxy Authentication Required',
            408 => 'Request Timeout',
            409 => 'Conflict',
            410 => 'Gone',
            411 => 'Length Required',
            412 => 'Precondition Failed',
            413 => 'Request Entity Too Large',
            414 => 'Request-URI Too Long',
            415 => 'Unsupported Media Type',
            416 => 'Requested Range Not Satisfiable',
            417 => 'Expectation Failed',

            // Server Error 5xx
            500 => 'Internal Server Error',
            501 => 'Not Implemented',
            502 => 'Bad Gateway',
            503 => 'Service Unavailable',
            504 => 'Gateway Timeout',
            505 => 'HTTP Version Not Supported',
            509 => 'Bandwidth Limit Exceeded'
        );
        if (array_key_exists($code, $_status)) {
            header('HTTP/1.1 '.$code.' '.$_status[$code]);
        }
    }
}//类定义结束
if (!function_exists('mime_content_type')) {
    /**
     +----------------------------------------------------------
     * 获取文件的mime_content类型
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    function mime_content_type($filename)
    {
        static $contentType = array(
            'ai'    => 'application/postscript',
                'aif'    => 'audio/x-aiff',
                'aifc'    => 'audio/x-aiff',
                'aiff'    => 'audio/x-aiff',
                'asc'    => 'application/pgp', //changed by skwashd - was text/plain
                'asf'    => 'video/x-ms-asf',
                'asx'    => 'video/x-ms-asf',
                'au'    => 'audio/basic',
                'avi'    => 'video/x-msvideo',
                'bcpio'    => 'application/x-bcpio',
                'bin'    => 'application/octet-stream',
                'bmp'    => 'image/bmp',
                'c'    => 'text/plain', // or 'text/x-csrc', //added by skwashd
                'cc'    => 'text/plain', // or 'text/x-c++src', //added by skwashd
                'cs'    => 'text/plain', //added by skwashd - for C# src
                'cpp'    => 'text/x-c++src', //added by skwashd
                'cxx'    => 'text/x-c++src', //added by skwashd
                'cdf'    => 'application/x-netcdf',
                'class'    => 'application/octet-stream',//secure but application/java-class is correct
                'com'    => 'application/octet-stream',//added by skwashd
                'cpio'    => 'application/x-cpio',
                'cpt'    => 'application/mac-compactpro',
                'csh'    => 'application/x-csh',
                'css'    => 'text/css',
                'csv'    => 'text/comma-separated-values',//added by skwashd
                'dcr'    => 'application/x-director',
                'diff'    => 'text/diff',
                'dir'    => 'application/x-director',
                'dll'    => 'application/octet-stream',
                'dms'    => 'application/octet-stream',
                'doc'    => 'application/msword',
                'dot'    => 'application/msword',//added by skwashd
                'dvi'    => 'application/x-dvi',
                'dxr'    => 'application/x-director',
                'eps'    => 'application/postscript',
                'etx'    => 'text/x-setext',
                'exe'    => 'application/octet-stream',
                'ez'    => 'application/andrew-inset',
                'gif'    => 'image/gif',
                'gtar'    => 'application/x-gtar',
                'gz'    => 'application/x-gzip',
                'h'    => 'text/plain', // or 'text/x-chdr',//added by skwashd
                'h++'    => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
                'hh'    => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
                'hpp'    => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
                'hxx'    => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
                'hdf'    => 'application/x-hdf',
                'hqx'    => 'application/mac-binhex40',
                'htm'    => 'text/html',
                'html'    => 'text/html',
                'ice'    => 'x-conference/x-cooltalk',
                'ics'    => 'text/calendar',
                'ief'    => 'image/ief',
                'ifb'    => 'text/calendar',
                'iges'    => 'model/iges',
                'igs'    => 'model/iges',
                'jar'    => 'application/x-jar', //added by skwashd - alternative mime type
                'java'    => 'text/x-java-source', //added by skwashd
                'jpe'    => 'image/jpeg',
                'jpeg'    => 'image/jpeg',
                'jpg'    => 'image/jpeg',
                'js'    => 'application/x-javascript',
                'kar'    => 'audio/midi',
                'latex'    => 'application/x-latex',
                'lha'    => 'application/octet-stream',
                'log'    => 'text/plain',
                'lzh'    => 'application/octet-stream',
                'm3u'    => 'audio/x-mpegurl',
                'man'    => 'application/x-troff-man',
                'me'    => 'application/x-troff-me',
                'mesh'    => 'model/mesh',
                'mid'    => 'audio/midi',
                'midi'    => 'audio/midi',
                'mif'    => 'application/vnd.mif',
                'mov'    => 'video/quicktime',
                'movie'    => 'video/x-sgi-movie',
                'mp2'    => 'audio/mpeg',
                'mp3'    => 'audio/mpeg',
                'mpe'    => 'video/mpeg',
                'mpeg'    => 'video/mpeg',
                'mpg'    => 'video/mpeg',
                'mpga'    => 'audio/mpeg',
                'ms'    => 'application/x-troff-ms',
                'msh'    => 'model/mesh',
                'mxu'    => 'video/vnd.mpegurl',
                'nc'    => 'application/x-netcdf',
                'oda'    => 'application/oda',
                'patch'    => 'text/diff',
                'pbm'    => 'image/x-portable-bitmap',
                'pdb'    => 'chemical/x-pdb',
                'pdf'    => 'application/pdf',
                'pgm'    => 'image/x-portable-graymap',
                'pgn'    => 'application/x-chess-pgn',
                'pgp'    => 'application/pgp',//added by skwashd
                'php'    => 'application/x-httpd-php',
                'php3'    => 'application/x-httpd-php3',
                'pl'    => 'application/x-perl',
                'pm'    => 'application/x-perl',
                'png'    => 'image/png',
                'pnm'    => 'image/x-portable-anymap',
                'po'    => 'text/plain',
                'ppm'    => 'image/x-portable-pixmap',
                'ppt'    => 'application/vnd.ms-powerpoint',
                'ps'    => 'application/postscript',
                'qt'    => 'video/quicktime',
                'ra'    => 'audio/x-realaudio',
                'rar'=>'application/octet-stream',
                'ram'    => 'audio/x-pn-realaudio',
                'ras'    => 'image/x-cmu-raster',
                'rgb'    => 'image/x-rgb',
                'rm'    => 'audio/x-pn-realaudio',
                'roff'    => 'application/x-troff',
                'rpm'    => 'audio/x-pn-realaudio-plugin',
                'rtf'    => 'text/rtf',
                'rtx'    => 'text/richtext',
                'sgm'    => 'text/sgml',
                'sgml'    => 'text/sgml',
                'sh'    => 'application/x-sh',
                'shar'    => 'application/x-shar',
                'shtml'    => 'text/html',
                'silo'    => 'model/mesh',
                'sit'    => 'application/x-stuffit',
                'skd'    => 'application/x-koan',
                'skm'    => 'application/x-koan',
                'skp'    => 'application/x-koan',
                'skt'    => 'application/x-koan',
                'smi'    => 'application/smil',
                'smil'    => 'application/smil',
                'snd'    => 'audio/basic',
                'so'    => 'application/octet-stream',
                'spl'    => 'application/x-futuresplash',
                'src'    => 'application/x-wais-source',
                'stc'    => 'application/vnd.sun.xml.calc.template',
                'std'    => 'application/vnd.sun.xml.draw.template',
                'sti'    => 'application/vnd.sun.xml.impress.template',
                'stw'    => 'application/vnd.sun.xml.writer.template',
                'sv4cpio'    => 'application/x-sv4cpio',
                'sv4crc'    => 'application/x-sv4crc',
                'swf'    => 'application/x-shockwave-flash',
                'sxc'    => 'application/vnd.sun.xml.calc',
                'sxd'    => 'application/vnd.sun.xml.draw',
                'sxg'    => 'application/vnd.sun.xml.writer.global',
                'sxi'    => 'application/vnd.sun.xml.impress',
                'sxm'    => 'application/vnd.sun.xml.math',
                'sxw'    => 'application/vnd.sun.xml.writer',
                't'    => 'application/x-troff',
                'tar'    => 'application/x-tar',
                'tcl'    => 'application/x-tcl',
                'tex'    => 'application/x-tex',
                'texi'    => 'application/x-texinfo',
                'texinfo'    => 'application/x-texinfo',
                'tgz'    => 'application/x-gtar',
                'tif'    => 'image/tiff',
                'tiff'    => 'image/tiff',
                'tr'    => 'application/x-troff',
                'tsv'    => 'text/tab-separated-values',
                'txt'    => 'text/plain',
                'ustar'    => 'application/x-ustar',
                'vbs'    => 'text/plain', //added by skwashd - for obvious reasons
                'vcd'    => 'application/x-cdlink',
                'vcf'    => 'text/x-vcard',
                'vcs'    => 'text/calendar',
                'vfb'    => 'text/calendar',
                'vrml'    => 'model/vrml',
                'vsd'    => 'application/vnd.visio',
                'wav'    => 'audio/x-wav',
                'wax'    => 'audio/x-ms-wax',
                'wbmp'    => 'image/vnd.wap.wbmp',
                'wbxml'    => 'application/vnd.wap.wbxml',
                'wm'    => 'video/x-ms-wm',
                'wma'    => 'audio/x-ms-wma',
                'wmd'    => 'application/x-ms-wmd',
                'wml'    => 'text/vnd.wap.wml',
                'wmlc'    => 'application/vnd.wap.wmlc',
                'wmls'    => 'text/vnd.wap.wmlscript',
                'wmlsc'    => 'application/vnd.wap.wmlscriptc',
                'wmv'    => 'video/x-ms-wmv',
                'wmx'    => 'video/x-ms-wmx',
                'wmz'    => 'application/x-ms-wmz',
                'wrl'    => 'model/vrml',
                'wvx'    => 'video/x-ms-wvx',
                'xbm'    => 'image/x-xbitmap',
                'xht'    => 'application/xhtml+xml',
                'xhtml'    => 'application/xhtml+xml',
                'xls'    => 'application/vnd.ms-excel',
                'xlt'    => 'application/vnd.ms-excel',
                'xml'    => 'application/xml',
                'xpm'    => 'image/x-xpixmap',
                'xsl'    => 'text/xml',
                'xwd'    => 'image/x-xwindowdump',
                'xyz'    => 'chemical/x-xyz',
                'z'    => 'application/x-compress',
                'zip'    => 'application/zip',
       );
        $type = strtolower(substr(strrchr($filename, '.'), 1));
        if (isset($contentType[$type])) {
            $mime = $contentType[$type];
        } else {
            $mime = 'application/octet-stream';
        }
        return $mime;
    }
}

if (!function_exists('image_type_to_extension')) {
    function image_type_to_extension($imagetype)
    {
        if (empty($imagetype)) {
            return false;
        }
        switch ($imagetype) {
           case IMAGETYPE_GIF    : return '.gif';
           case IMAGETYPE_JPEG    : return '.jpg';
           case IMAGETYPE_PNG    : return '.png';
           case IMAGETYPE_SWF    : return '.swf';
           case IMAGETYPE_PSD    : return '.psd';
           case IMAGETYPE_BMP    : return '.bmp';
           case IMAGETYPE_TIFF_II : return '.tiff';
           case IMAGETYPE_TIFF_MM : return '.tiff';
           case IMAGETYPE_JPC    : return '.jpc';
           case IMAGETYPE_JP2    : return '.jp2';
           case IMAGETYPE_JPX    : return '.jpf';
           case IMAGETYPE_JB2    : return '.jb2';
           case IMAGETYPE_SWC    : return '.swc';
           case IMAGETYPE_IFF    : return '.aiff';
           case IMAGETYPE_WBMP    : return '.wbmp';
           case IMAGETYPE_XBM    : return '.xbm';
           default                : return false;
       }
    }
}
